Hi Dennis,
I have really enjoyed learning about metal working. Here are a few sources of information that helped me a lot. The book
The Key to Metal Bumping by Frank Sargent gives a nice explanation on the theory behind proper metal repair. It is an older book first published in 1939 so very appropriate for our vehicles.
Brian Martin has written his basics of basics articles. They can be found at
http://www.autobodystore.com/martinsr.shtml And finally Ron Covell has some fantastic videos on the art and craft of metal working. His info can be found at
http://www.covell.biz/ As Denny already pointed out (and I learned the hard way) sheet metal repair is more like gently and slowly coaxing the metal back to its original shape.
